Straightedge



Patented Nov. 13, 1928.

PATENT OFFICE.

HOWARD E. BENWAY, OF WIGHIT A, KANSAS.

STRAIGHTEDGE.

Application filed August 24, 1925. Serial No. 52,054.

My invention relates to straight edges, and has for its chief object a straight edge that will not warp or the edges get .out of alignment.

A further object of my invention is to construct a straight edge eliminating undue shrinkage.

A still further object of my invention is to construct a straight edge placing the strips of wood so that the grain thereof be transversely disposed to each other equalization of shrinkage.

A. still further ob 'ect straight edge decreasing flexibility.

A still further object of my invention is to adopt a manner of assembly that by resawing each strip will be as in Fig. 1.

Referring to the drawings, like characters will apply to like parts in the difierent views and the Figures herein referred to will identify the views as follows";

Fig. 1 is an enlarged perspective detail, howing a fragmentary part of the finished traight edge.

Fig. 2, is an intermediate lamination for the cant.

Fig. 3 is a view of the cant as prepared for resawing.

In Fig. 1, a centrally disposed laminated section consisting of strips of wood 1 and 2, the grain of which are transversely disposed to each other, and alternately positioned is a fiber member 3, being of a firm texture and the said parts being connected by means of glue or other cementing process, and member 4 is a like material transversely disposed to said members; adjacent thereto are members 5 and 6, said members being of wood and the grain thereof being similar but vertically disposed, the said members l, 5, and 6 being firmly cemented forming a blade like member, functioning as a straight edge, and thus would be the process of as sembly.

For economy in producing the blades, I first produce a laminated member as shown in Fig. 2, the said member being of strips for will

is to. provide of wood and composition fiber alternately stacked, and on both sides thereof as at A, the strips of fiber 4 is cemented firmly thereto; I then cement strips of wood 5 and 6 firmly. to said fiber members, all of which form a cant as shown in Fig. 3, thus is the process of assembly preparatory to resawing on lines B at which point the wood strips 1 and 2 are divided, producing the straight edge as shown in 1.

It will now be understood that by the assembly of the materials into a form as in Fig. 3, and by resawing said form along the lines as heretofore described develops a blade having an intermediately disposed H fiber member functioning as stiffening means for said blade longitudinally, when the edges of the'blade as at C are straightened by means of planing or otherwise, they will remain true and straight a longer period of time by reason of the position of the grain of the wood relative to each member, and the fiber member positioned therein as shown.

It will be further understood that the fiber members being so positioned will add rigidity to any springing tendency of the blade functioning as a straight edge. The

straight edge herein disclosedis very useful for paper hangers in that if the blade is incli-ned to crook, having a slight curvature it will be impossible to trim wall paper for butted work. i

, Such modifications may be employed as lie within the scope of the appended claim. What I claim as new and desire to secure by Letters Patent is In a straight edge, in combination, a pair of wood strips, a fibrous strip between said strips, fiber strips transversely positioned to engage the longitudinal edges of said first named strips, a wood strip positioned on the outside of each of the second named fiber strips, and adhesive substance between all of said strips to firmly hold them together and thus form a straight edge.

HOWARD E. BENWAY. 

